If altitude bubble is provided both on index frame as well as on teles – McqOptions

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1.	If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference to
A.	only (i)
B.	both (i) and (iv)
C.	only (iii)
D.	both (ii) and (iii)
Answer» C. only (iii)

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